A one-dimensional Stefan problem with spherical symmetry corresponding to the evaporation process of a droplet is considered. An equivalent integral formulation is obtained, and through a fixed point theorem, the existence and uniqueness of the solution are proved.

中文翻译：

---

具有球对称性的Stefan问题的积分公式

考虑与液滴的蒸发过程相对应的具有球形对称性的一维Stefan问题。得到了一个等效的积分公式，并通过一个不动点定理，证明了该解的存在性和唯一性。